Amazing drying performance, super efficient. The MTD09HPWH/1 is really efficient thanks to the Intellisense Advanced Sensor Technology that measures the level of humidity within the drum, and controls and adjusts the temperature accordingly so your clothes don’t overdry. This saves you time and energy, earning the dryer an A++ energy rating which will really save you money on your bills. The Optimum Diagonal Air Flow System heats the air flow through the drum diagonally, exposing the laundry to the hot air for longer, which improves the drying efficiency. And it comes with heat pump technology that reuses the hot air created during a cycle, using a lot less energy in the process.